GST (Goods and Services Tax) is India's unified indirect tax introduced on 1 July 2017. It replaced a complex web of central and state taxes. This calculator helps businesses, traders, and consumers quickly calculate how much GST applies to any transaction, and whether the amount entered is inclusive or exclusive of GST.
Worked Example:
Service Invoice = ₹10,000 | GST Rate = 18% | Intrastate
GST Amount = 10,000 × 18% = ₹1,800
CGST = ₹900 | SGST = ₹900
Total Invoice = ₹11,800
What is the difference between CGST, SGST and IGST?â–¾
CGST (Central GST) and SGST (State GST) are charged together on intrastate transactions, each half of the total GST rate. IGST (Integrated GST) replaces both and is charged on interstate transactions and imports. It equals the full GST rate.
Who needs to register for GST?â–¾
Any business with annual turnover above ₹40 lakh (₹20 lakh for services) must register for GST. E-commerce sellers must register regardless of turnover. Voluntary registration is also allowed.
What is an HSN code?â–¾
HSN (Harmonized System of Nomenclature) is a standardized system of names and numbers to classify goods. In India, GST uses HSN codes to determine the applicable GST rate for each product. Businesses with turnover above ₹1.5 crore must quote HSN codes on invoices.
When is GST not charged?â–¾
GST is not charged (0%) on essential items like fresh vegetables, fruits, milk, eggs, cereals, and certain medicines. Educational services and healthcare services are also largely exempt.